1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/*
|
|
* LCD Lowlevel Control Abstraction
|
|
*
|
|
* Copyright (C) 2003,2004 Hewlett-Packard Company
|
|
*
|
|
*/
|
|
|
|
#ifndef _LINUX_LCD_H
|
|
#define _LINUX_LCD_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/notifier.h>
|
|
|
|
struct lcd_device;
|
|
struct fb_info;
|
|
|
|
/* This structure defines all the properties of a LCD flat panel. */
|
|
struct lcd_properties {
|
|
/* Owner module */
|
|
struct module *owner;
|
|
/* Get the LCD panel power status (0: full on, 1..3: controller
|
|
power on, flat panel power off, 4: full off), see FB_BLANK_XXX */
|
|
int (*get_power)(struct lcd_device *);
|
|
/* Enable or disable power to the LCD (0: on; 4: off, see FB_BLANK_XXX) */
|
|
int (*set_power)(struct lcd_device *, int power);
|
|
/* The maximum value for contrast (read-only) */
|
|
int max_contrast;
|
|
/* Get the current contrast setting (0-max_contrast) */
|
|
int (*get_contrast)(struct lcd_device *);
|
|
/* Set LCD panel contrast */
|
|
int (*set_contrast)(struct lcd_device *, int contrast);
|
|
/* Check if given framebuffer device is the one LCD is bound to;
|
|
return 0 if not, !=0 if it is. If NULL, lcd always matches the fb. */
|
|
int (*check_fb)(struct fb_info *);
|
|
};
|
|
|
|
struct lcd_device {
|
|
/* This protects the 'props' field. If 'props' is NULL, the driver that
|
|
registered this device has been unloaded, and if class_get_devdata()
|
|
points to something in the body of that driver, it is also invalid. */
|
|
struct semaphore sem;
|
|
/* If this is NULL, the backing module is unloaded */
|
|
struct lcd_properties *props;
|
|
/* The framebuffer notifier block */
|
|
struct notifier_block fb_notif;
|
|
/* The class device structure */
|
|
struct class_device class_dev;
|
|
};
|
|
|
|
extern struct lcd_device *lcd_device_register(const char *name,
|
|
void *devdata, struct lcd_properties *lp);
|
|
extern void lcd_device_unregister(struct lcd_device *ld);
|
|
|
|
#define to_lcd_device(obj) container_of(obj, struct lcd_device, class_dev)
|
|
|
|
#endif
|